Rig Not Working Properly
It looks like your boots are parented to bones that they are not supposed to. The simplest way to fix it is to select them in Edit mode, then in the Properties panel &gt; Data &gt; Vertex Groups &gt; on the right of the vertex groups list, click on Remove from All Groups so that this part of the mesh won't be controlled by any bone. Now, keep your armature in Pose mode, select your object, go in Weight Paint mode, select the bone to which the boot is supposed to be linked and paint the boot with a brush in Blend &gt; Mix mode.